YT Embed Auto-pause.user.js

// ==UserScript==
// @name         YT Embed Auto-pause
// @namespace    [NAMEHASH]
// @version      0.1
// @description  Pauses Youtube Videos after a delay
// @author       /u/AyrA_ch
// @match        https://youtube.com/embed/*
// @match        https://*.youtube.com/embed/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var autoplayOnly=false;
    //Only run timer if video is on autoplay
    if(!autoplayOnly || location.href.match(/[\&\?]autoplay=1/)){
        window.setTimeout(function(){
            var v=document.querySelector("video");
            if(v && !v.paused){
                v.pause();
            }
        },200000);
    }
})();